Miyoo >> Assembly
LCD(GPIO)
參考資料：
1. pdf
2. lichee
3. mangopi_r
4. allwinner
main.s
.global _start
.equiv PIO_BASE, 0x01c20800
.equiv PD, (0x24 * 3)
.equiv PE, (0x24 * 4)
.equiv PIO_CFG0, 0x00
.equiv PIO_CFG1, 0x04
.equiv PIO_CFG2, 0x08
.equiv PIO_DATA, 0x10
.equiv LCD_CS, (1 << 21)
.equiv LCD_RD, (1 << 20)
.equiv LCD_RS, (1 << 19)
.equiv LCD_WR, (1 << 18)
.equiv LCD_RST, (1 << 11)
.equiv LCD_BL, (1 << 6)
.arm
.text
_start:
.long 0xea000016
.byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0'
.long 0, __spl_size
.byte 'S', 'P', 'L', 2
.long 0, 0
.long 0, 0, 0, 0, 0, 0, 0, 0
.long 0, 0, 0, 0, 0, 0, 0, 0
_vector:
b reset
b .
b .
b .
b .
b .
b .
b .
reset:
ldr r4, =PIO_BASE + PD
ldr r1, =0x11111111
str r1, [r4, #PIO_CFG0]
str r1, [r4, #PIO_CFG1]
ldr r1, =0x00111111
str r1, [r4, #PIO_CFG2]
ldr r4, =PIO_BASE + PE
ldr r1, [r4, #PIO_CFG0]
bic r1, #0xf000000
orr r1, #0x1000000
str r1, [r4, #PIO_CFG0]
ldr r1, [r4, #PIO_CFG1]
bic r1, #0xf000
orr r1, #0x1000
str r1, [r4, #PIO_CFG1]
ldr r4, =PIO_BASE + PD
ldr r1, =0xffffffff
str r1, [r4, #PIO_DATA]
ldr r4, =PIO_BASE + PE
ldr r1, =0xffffffff
str r1, [r4, #PIO_DATA]
bl lcd_rst
ldr r0, =0xb0
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xb1
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xb3
bl lcd_cmd
ldr r0, =0x02
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xb4
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xc0
bl lcd_cmd
ldr r0, =0x07
bl lcd_dat
ldr r0, =0x4f
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x01
bl lcd_dat
ldr r0, =0x33
bl lcd_dat
ldr r0, =0xc1
bl lcd_cmd
ldr r0, =0x01
bl lcd_dat
ldr r0, =0x01
bl lcd_dat
ldr r0, =0x11
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0xc3
bl lcd_cmd
ldr r0, =0x01
bl lcd_dat
ldr r0, =0x01
bl lcd_dat
ldr r0, =0x11
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0xc4
bl lcd_cmd
ldr r0, =0x11
bl lcd_dat
ldr r0, =0x01
bl lcd_dat
ldr r0, =0x43
bl lcd_dat
ldr r0, =0x01
bl lcd_dat
ldr r0, =0xc8
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x8a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x09
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x10
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x23
bl lcd_dat
ldr r0, =0x10
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x60
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x10
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xc9
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x8a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x09
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x10
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x23
bl lcd_dat
ldr r0, =0x10
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x09
bl lcd_dat
ldr r0, =0x88
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x23
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xca
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x8a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x09
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x10
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x23
bl lcd_dat
ldr r0, =0x10
bl lcd_dat
ldr r0, =0x05
bl lcd_dat
ldr r0, =0x09
bl lcd_dat
ldr r0, =0x88
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x08
bl lcd_dat
ldr r0, =0x0a
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x23
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xd0
bl lcd_cmd
ldr r0, =0x07
bl lcd_dat
ldr r0, =0xc6
bl lcd_dat
ldr r0, =0xdc
bl lcd_dat
ldr r0, =0xd1
bl lcd_cmd
ldr r0, =0x54
bl lcd_dat
ldr r0, =0x0d
bl lcd_dat
ldr r0, =0x02
bl lcd_dat
ldr r0, =0xd2
bl lcd_cmd
ldr r0, =0x63
bl lcd_dat
ldr r0, =0x24
bl lcd_dat
ldr r0, =0xd4
bl lcd_cmd
ldr r0, =0x63
bl lcd_dat
ldr r0, =0x24
bl lcd_dat
ldr r0, =0xd8
bl lcd_cmd
ldr r0, =0x07
bl lcd_dat
ldr r0, =0x07
bl lcd_dat
ldr r0, =0xe0
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x13
bl lcd_cmd
ldr r0, =0x20
bl lcd_cmd
ldr r0, =0x35
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x44
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x30
bl lcd_dat
ldr r0, =0x36
bl lcd_cmd
ldr r0, =0xe0
bl lcd_dat
ldr r0, =0x3a
bl lcd_cmd
ldr r0, =0x55
bl lcd_dat
ldr r0, =0x2a
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x01
bl lcd_dat
ldr r0, =0x40-1
bl lcd_dat
ldr r0, =0x2b
bl lcd_cmd
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0x00
bl lcd_dat
ldr r0, =0xf0-1
bl lcd_dat
ldr r0, =1000
bl delay
ldr r0, =0x11
bl lcd_cmd
ldr r0, =1000
bl delay
ldr r0, =0x29
bl lcd_cmd
ldr r0, =1000
bl delay
ldr r0, =0x2c
bl lcd_cmd
ldr r4, =320*240
ldr r5, =0xf800
0:
mov r0, r5
bl lcd_dat
subs r4, #1
bne 0b
b .
delay:
push {lr}
0:
subs r0, #1
bne 0b
pop {pc}
lcd_rst:
push {r4, r5, lr}
ldr r4, =PIO_BASE + PE
ldr r5, =0xffffffff
bic r5, #LCD_RST
str r5, [r4, #PIO_DATA]
ldr r0, =10000
bl delay
orr r5, #LCD_RST
str r5, [r4, #PIO_DATA]
ldr r0, =10000
bl delay
pop {r4, r5, pc}
lcd_wr:
push {r4, r5, lr}
ldr r4, =PIO_BASE + PD
and r2, r0, #0x00ff
and r3, r0, #0xff00
lsl r2, #1
lsl r3, #2
eor r5, r5
orr r5, r1
orr r5, r2
orr r5, r3
orr r5, #LCD_RD
str r5, [r4, #PIO_DATA]
orr r5, #LCD_WR
str r5, [r4, #PIO_DATA]
pop {r4, r5, pc}
lcd_dat:
push {lr}
mov r1, #LCD_RS
bl lcd_wr
pop {pc}
lcd_cmd:
push {lr}
mov r1, #0
bl lcd_wr
pop {pc}
.end
完成
